Invoice generator clears all fields if one field is incorrect

[joonatanaatos]

If an error occurs when trying to send an invoice, all of the fields are cleared from the form and everything needs to be filled in again. For example, if the IBAN bank number is incorrect, clicking the send button will result in everything being cleared. The same happens also if the invoice total exceeds the integer limit.

Ideally, it would give the error message while keeping all information that was submitted.

[MikaelSiidorow]

Related to facebook/react#29034 with workarounds in the comments

[patrr2]

dibs